“The tax system established by Hazrat Umar (RA); (An Analytical Study of the Four Schools of Jurisprudence): حضرت عمررضی اللہ عنہ  کا مرتّب کردہ ٹیکسز کا نظام؛فقہی مذاہب اربعہ کاتجزیاتی مطالعہ” (2024) Rooh-e-Tahqeeq, 3(4), pp. 3–14. Available at: https://rooh-e-tahqeeq.com/index.php/ret/article/view/110 (Accessed: 14 January 2026).